enum Message{
    Quit,
    Move{x:i32,y:i32},
    Write(String),
    ChangeColor(i32,i32,i32),
fn main() {
    impl Message{
        fn call(&self){
            //
        }
    }
    let m =Message::Write(String::from("hello"));
    m.call();
    println!("Hello, world!");
}
